Signal control



SePf- 19, 1939- J, R. PARACHEK '2,173,370

S IGNAL CONTROL F'led Dec. 28, 1957 jaw Patented Sept. 19, 1939 UNITEDSTATES PATENT OFFICE 1 Claim.

This invention relates to remote control of audible or visible signals,especially as interconnection between fluid and electric transmissions.

5 This invention has utility as a warning for station or windowattendants as at automobile service or lling stations and clerks atticket, cash, or other types o windows or counters.

Referring to the drawing:

10 Fig. 1 is a view, with parts broken away, Showing an embodiment ofthe invention adapted for response hereunder say as crossed by a motorvehicle;

Fig. 2 is a plan view of the transmission box o connection device ofFig. l;

Fig. 3 is a section on the line III-III, Fig. 1, showing the box in endelevation;

Fig. 4 is a side elevation of an enlarged scale from the showing in Fig.1 with the protective cover removed;

Fig. 5 is a section on the line V-V, Fig. 3, showing the device inswitch closing position, thereby departing from the open positionshowing in Fig. 4;

Fig. 6 is a section on the line VI-VI, Fig. 4, showing the adjustablefluid terminal of the switch device;

Fig. 7 is a section on the line VII-VII, Fig. 4, of the electricalconnection to the carrier for the operating lever of the switch device;and

Fig. 8 is a view of an embodiment of the invention as a cashiers windowsignal.

Along driveway I adjacent the service portion of a lling station, theremay extend tube 2, say oi rubber, normally retaining its form, but ascompressed by motor vehicle wheels thereover conducting a puff of suchair along the tube as through the station wall 3 to tting 4 as protectedfrom the weather.

This fitting 4 is shown as into insulation block 5to chamber 6terminating in plug 1 having small port 8 upwardly therefrom. Thistransit of a vehicle over the compressible duct or tube 2 causes a puffof air out of the port 8 to thrust cap 9 away from closed position. Thispuff, in shifting the cap 9, moves such cap with lever I upon which itis mounted. This lever III has fulcrum II in conductor stem I2 risingfrom the insulation block 5. This conductor stem I2 is connected withblock I 3 having terminal I4 therefrom extending by line I to energysource I6. From the opposite' side of this energy source I6 extendconductor line I'I to signal, herein shown as audible or bell device I8,located in a place to be heard or observed about the lling station. Thecircuit from this signal device I8 is completed by line I9 to terminal20 extending into the block 5 to conductor member 2 I, to which threadedportion 22 of cup 23 extends for adjusting its position (Cl T200-81) incarrying conductor iluid as mercury 24 therein. This adjustmentdetermines nicely the position which the cap 9 may be in for closedposition at the port 8 and pin 25 in the remote end of the lever IIJclear of the mercury 24 in cup 23.

Accordingly, in this thrusting upward of the cap 9 clear of the port 8the opposite end of the lever I0 is thrust downwardly to carry theterminal pin 25 into the mercury terminal 24 in completing the circuitand thereby operating the signal I8. This circuit-completing position iseffected by the movement of the pin and dissipation of its momentum atits striking the mercury. There is, accordingly, a time intervaleffectiveness for holding this circuit closed in operating the signalI8, notwithstanding there may be rapid transit of the vehicle in itscompression of the tube 2. This mercury switch is one which is of lowresistance and effective for circuit closing and opening responsewithout material depreciation over an extended period of time.

In completing this set-up, screws 26 in the block 6 may mount anglebracket 2l so that additional Screws 28 may position this bracket on aStation wall or elsewhere as desired. To avoid impact or tampering withthis control for the signal, cap 29 may be assembled as a housingthereover by screw 30 engaging in the lever support or the stem I2. Thispressure response through the compressible duct 2 may be effected frommat 3l, say in position adjacent tellers window 32 in a bank or otherplace where a clerk may have other matters requiring attention and wishto be apprised or warned as someone appears.

The fluid transmission response at the compressing oi the duct 2, eventhough a slight or minor pui, may rock this sensitive lever device andeiect switch closing for electrical transmission to the closed circuitin sensitive response thereto, which may be visible signal 33 (Fig. 8)or audible signal I8 (Fig, 1).

What is claimed and it is desired to secure by Letters Patent is:

For an electric signal circuit having a pair of terminals, an insulationblock base providing spaced mounting for said terminals, andadditionally a .duct insulation pedestal port, a lever having fulcrummounting on one of said terminals, a mercury cup on the other terminal,a contact carried by the lever for swinging into and out of circuitclosing position as to the mercury cup, a housing for the lever,terminals and port providing a common chamber thereover, a cap for theport also carried by the lever, and pneumatic fluid disturbance supplymeans to act on the cap which intercepts ow from the port into saidchamber for effecting shifting of the lever.

JOSEPH R. PARACHEK.

